No. 44 of 84 ·Image Compression Software

crun

Linux · Self-hosted

Freedom report

Two barsScore 6.0

Free tierA free tier is on its own pricing page
Open codeNo open-source code on record
Runs widely1 of 6 device platforms
DocumentedPlans, terms and facts published

crun is ranked #44 of 84 in image compression software on Freedom251. It runs on Linux, Self-hosted. There is a free plan.

crun plans and pricing

All plans

crun Free OCI container runtime · source build and release binaries github.com · 3 Oct 2026

Compared on image compression software

Free plan: Yes
Rootless mode: Yes
Windows containers: No
Image format: oci
Runtime interface: other
Supported host OS: Linux (including Fedora, RHEL/CentOS, Ubuntu, Alpine and Tumbleweed)

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The record

Product: crun is a fast, low-memory-footprint OCI container runtime written in C.
OCI compatibility: crun conforms to the OCI Container Runtime specifications.
Library: The project aims to make crun usable as a library for programs that manage OCI containers without an external process.
Performance: The README reports 100 sequential /bin/true containers taking 1.69 seconds with crun and 3.34 seconds with runc on the author's machine.
Integration: The README demonstrates using crun with Podman via the --runtime option.
Build platforms: The README lists build instructions for Fedora, RHEL/CentOS Stream 9 and 10, Ubuntu, Alpine, and openSUSE Tumbleweed.
Releases: The releases page lists Linux amd64 and arm64 binaries, including variants built with systemd disabled.
Artifact verification: The README says official release artifacts are signed and provides GPG commands to verify them against the repository keyring.
Security reporting: The security policy directs vulnerability reports through GitHub Security Advisories rather than public issues or pull requests.
Security practices: The security policy says CI runs fuzz testing with honggfuzz, AddressSanitizer runtime analysis, and clang-check and clang-format quality checks on pull requests.
Supported versions: The security policy says the latest version receives regular patch releases, while fixes for prior versions are best-effort and not guaranteed unless specified in a support matrix.
Security response: The project aims to acknowledge security reports within three business days and says confirmed issues are handled according to severity and impact.
Steward: The security policy identifies Red Hat, Inc. as the project's open source software steward under the EU Cyber Resilience Act.
Contributor requirements: The contribution guide says contributors need C knowledge and a Linux environment, and requires a Developer Certificate of Origin sign-off for pull requests.
Price from: Free

Where it ranks on Freedom251

Best Image Compression Software in 2026#44 of 84
Best Container Engines in 2026#9 of 31
Best Container Runtime Software in 2026#10 of 27
Best Sandbox Software in 2026#6 of 22

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Sources

github.com/containers/crun· checked 3 Oct 2026
github.com/containers/crun/releases· checked 3 Oct 2026
github.com/containers/crun/blob/main/README.md· checked 3 Oct 2026
github.com/containers/crun/blob/main/SECURITY.md· checked 3 Oct 2026
github.com/containers/crun/blob/main/CONTRIBUTING.· checked 3 Oct 2026
github.com/containers/crun/blob/main/crun.1.md· checked 3 Oct 2026